A net-work node (1) of a telecommunication network (6) controls a play-out of cached content to a user equipment (2a, 2b). The network node retrieves an address contained in a response from the core network (5) to a request associated with the user equipment. If the network node detects that the address is associated with a defined server, e.g. a credit refill server or an advertisement server, the play-out of cached content to the user equipment is disabled. The play-out is activated again when a response to an additional request contains an address that is associated with another source than said defined server.